The Artistry of Mixing Drinks by Frank Meier (1936, p.28)

1 dashAngostura bitters — Angostura Bittersbase
1 dashorange bitters — Orange Bittersbitter
1 glassCinzano Vermouth — Cinzano Vermouthmodifier
  1. Stir and serve with orange or lemon peel.

Garnish: Orange or lemon peel